Differential mechanism.



'tiran amarre narrar renna in. Lauris," or emerso, intrants.

llll

To all whom if may concern.'

mrrnnmvr'ra. Meenemen.

masones.

Be it known that l, FRANK M. Lewis,

a citizenof the United States or' America, county of Coole: l

invented certain' residing at Chicago, 1n the and State of 1illinois, have new and useful Improvements in Diierential Mechanism, of which the following is a specification.

y invention relates to improvements in differential mechanism; and the primary object of my improvement "is to provide cam operated shiftable members of the positive drive-type in mechanism olf the class described.

A further object of my present improvement is to afford simple e'ective means to l constantly urge. the shiftable members out gill;

of power transmission engagement.

Another object of my present improvement is the provision of means carried by the shiftable membersf'fto limit relative ro tative movement thereof.

With the above and Other-,Objects `in View, my invention consistsin'the novel features and in the novel combination and arrangement of parts hereinafter more specically described, illustrated drawings forming a part ofl this speciication, and particularly pointed ont inthe claims hereunto appended. It will be understood that changes, variations and modif.

' 34. 35, 36 and B7, respectively.

lcations in the details of the invention Withu in the scope or the claims may be resorted to Without departing from the spirit` or sacrificing any of the advantages thereof. ln the accompanying drawings Figure l is a horizontal central section of therear axle and housing of a motor vehicle with my inventionapplied thereto; Fig. 2 is a similar view showingthe parts in disengaged position; i Fig. 3 is-af-perspectiveyiew ofa driving member;

Fig'. l is a plan view with over; i

Fig. 5 is a detail of means'for limiting relative rotativemovement of theshiftable members;

`Fig 6 is a sectionaldetail of retarding means; v Fig. 7 is a sectional detail of the radial cams and recesses of the driving and shift able members;

Specification of Letters Patent.

in the accompanying l members. The free end of the post is parts broken bers comprises the'v 'holes parte ratentea not. a, raie.- Applicaton :filed April 23.1917; Serial No. 163,789.

.liti

member with squared arialopening; 9, and

hub l0 in Which is lined the squared end portion 'll' of the independent shaft l2.' A 13 designates a tooth clutch member having a vsquared axiallopening 14a-nd heb 15, to receive the squared, end portion lo of the independent i8 are adapted to positively the shilitable vtooth after referred. to.

A driving member 19 .is provided with'a engage with clutch members here1nconcentric slot 20 and radial stads 2l. The" radially disposed double cams 22 and 2S onthe respective sides of the driving mem ber have Working faces 24, 25, 26 andl 27. The axial openingflreceives the hubs l0 and l5.

There is provided what is termed shift able .tooth clntch membersQ9 and 30 haw `ing axial openings 3l therethrough., by

which said'shiitable members are slidably mounted oil-the hubs l0 and l5 of the driven members 8 and .l3,respectiv`elA Preferably the camnecesses 32 and 33 are ,formed in the side of the shiltable tooth clutch members and have Working; faces The post 38 is integral with or may be at'- tached to one of the shiftable tooth clutch adapt ed to have a limited travel inthe vpostn .recess 39 of the other clutch member.

40 and 41 indicate the gear teeth on the respective `shittable tooth clutch members. l

42 and 43 are theannular ,recessesin the l shilitable tooth clutch members, and 44 and 45 the compression springs seated therein.

Retarding means tomoppose relative rota* tive movement of thedriven. toothclnt'ch members and the shitable toothlclutch mema6, compression springs 47 and bolt 48, the free end ol which bears against the gear teeth of the adjacent driven tooth clutch member.

In case either of the shiitable members should stick in disengaged position when one Wheel is running faster than the other, asthe faster running shaft l?. llhe gear teeth? wheel slows down the llllli gagement w Spi-finti' in turning to the let, the members l and 29 'will rotate together running ahead ot the A member19 until the post 38 strikes the wall ltooth clutch members, each formed on one ieeoea bolt 1lb., by exertinhA abaclrward dragging i l2. In differential mechanism, the Combletleet on the shiftable Clutch member, Causes nation of independent shafts,andldriven tooth the latter to rengage the driven member under the inliuence ot the cams on the driv-. ing member 19. v v v l' 4.9 and 50 designate the opposite end walls of the post-recess 5i is a. rotatable housing, bolted together at y n a. non-rotatable housing.` 1

is bevel 2rear wheel riveted at 55 to the rotatable housing. I

in l? is soown a modilied vform ofthe radially disposed cams and nam-recesses. The nirnnerals 5'?, G() and (il indicate the .vorltii'ngY ifaoes in the driving,` men'iber and the numerais 58, 19, 62 and deiioting the working oam la'ceslon the respective shiftable tooth clutch members.

ln operation, ii/'hen power is applied to the rotatable'housing the driving member is caused to rotate-dnd change the positions of the ooms in respect tothe shiftable members which will be #forced outwardly into positive. engagement' with the driven members.

The member 'l-being; attached to the rotatable housing, will be moved in either direetion, ltorward or backward, as desired7 and the Gams 22 and 23, will push out\.vardly the "3G, and thus torce. the. teeth oi: the parts, 39,

shiftable tooth clutch' members` 29 and ,30, finto elnteh engagement with the tooth :oh members 8, i3.

Fthen either vehicle wheel increased in i as in turning a corner, for instance i9 et the member 30 (ses Fig. at which time the tension of the coil spring -lll vunder compression will. foroethe part 29 ont o'l' en- '1" the member S and the vehicle Wheel will be ,tree to rotate at the increased speed, after which rengagenient of these parts taires place. The springs 44: are not indispensable to the operation of the meehanism` and may be omitted ii desired,

.lilas-'ing thus fully described my invention, what l claim new, and desireito secure by Letters Patent, is: Y

l. ln differential. mechanism, the combination oit independent shafts, and driven tooth. clutch members lixed to their opposing' ends and :formed with inwardly extending hubs, a driving member, and a pair of Shiitable Vtooth clutch members each slidably mounted on one of said hubs and formed on one sioe for eluteh engagement with, a, driven vtooth clutch member and on the other sidewuitably :termed ior cam action with the driving member, whereby saidfshiftarble tooth clutch members are moved into posi y tive power transii'i.ittiiip;y engagement with clutch members fixed totheir opposing ends, and formed with inwardly extending hubs, a driving member loosely mounted on the inner ends ot' said hubs, a pair of shiftable tooth clutch members cach slidably mounted on one of said. hubs and formed on one side for positive engagement with ay driven tooth clutch member and on the other side suitably formed for oam action with the driving member, whereby the shiftable tooth clutch members are moved into positive power transmitting engagement with the respectivo tooth clutch members, and means-to limit relative rotative movement ol the shi'ltable Clutch members.

In differential n'ieohanism` in combination with independent -sha-:tts and tooth clutch members fixed to their opposing ends, a` driving member, a plurality ot' slniftable tooth clutch members eaoh formed on one side for positive power transmitting engagement with a tooth clutch member and on the other side suitably formed for cam action with the driving member to move the shittable tooth clutch members into positive power t ansmitting engagement with the respective tooth olutoh members, means to limit relative rotative movement ol the shiftable tooth clutch members and yieldable means to urge the shift able tooth eluteh members out of power transmitting engagement with the tooth clutch inen'iliers.

4.. ln ditlerential mechanism, in combination with independent sha tts and tooth clutch members lixed to their opposing,l ends, a drivingiF member, a plurality ol shiftable side for positivo engagement with ay tooth clutch member and on the other side suitably formed for cam act1on with the driving member to move the shiftable toothi members, a shiftable tooth clutch member on both sides of the driving member formed and adapted for positive engagement with the tooth clutch members, means to limit relative rotativemovement of the shit'table tooth oluteh members, vand means to urge the shiftable tooth clutch members out of engagement with the tooth clutch members. in differentialmeohanism, in eombination, e driving member having radially disn ineeeee Jnosed double neme on both sidentootli olnteb meinbeine, e, sbifteble tooth clutch member on both sides oft the d iivingme'niber and formed end indebted fon positive engagement with tbe tooth elnteli members, ineens to limit .teletive irotetive movement of the sbiitteble i v tootb elutob members, means to urge the shiftm eble tooth clutch membeis ont offengsgement with tbe driven tooth clutch medlbers, and yieldnble ineens to oppose iele'tive rotative movement of the shifteble tootlgelutch mem- Fbers with the adjacent tootliflutoh mein seis, 7i. lin didetentiel meohenismythe combine- A tion 'with e rotatable/housing medein sepe1ebleperts bolted wget-heeZ ot e driving meinbei' lie-ving radial studs clamped between tbe meeting parts-of Y with ezims on its sides, independent axles having, their proximate ends entering tbe opposite sides oi said housing; driven memers fest on the inner ends ol' seid axles within seid housing, and latere-ily shifteble `tooth clutch members between seid driving member and said driven members normally urged into engagement with the latter by the ooms on seid driving member.

ln testimony whereof l affix my signature in thevpresence of' a Witness.

FRANK M. LEWIS. y

Witness:

l SCOTT M. HOGAN.

said housing end formed 

